ZTHY C31N1815 50Wh Laptop Battery for Asus ZenBook 13

ZTHY 50Wh C31N1815 is a direct replacement Li‑Polymer battery designed to restore power and portability to compatible ASUS ZenBook 13 UX333 series laptops.

When your ZenBook 13 shows shortened runtime or won't power on without the charger, a reliable replacement battery can bring it back to everyday use. This ZTHY unit matches the original specifications—11.55V and 50Wh (4335mAh)—and fits models in the UX333, RX333, BX333 and U3300FN families. It’s built to the same form factor and connector layout as the factory part numbers like C31N1815 so installation is straightforward for technicians or experienced users.

Which ASUS models will this ZTHY battery work with?

This battery is compatible with a long list of ZenBook 13 variants. It’s intended for UX333 and related model codes that use the C31N1815 part. Double‑check your laptop’s service label or the original battery sticker to confirm model compatibility before ordering.

• Common matches: UX333F, UX333FA, UX333FAC, UX333FN.
• Also fits RX333F/RX333FA/RX333FN and BX333F/BX333FA/BX333FN.
• Included series: U3300FN and many factory SKUs with C31N1815.

How does the ZTHY battery compare to the original in performance?

The ZTHY 50Wh battery provides the same voltage and similar capacity as the OEM pack, giving comparable run time for everyday tasks like web browsing, office work, and media playback. Because it uses Li‑Polymer chemistry and matches factory electrical specs, system power management and charging behavior remain consistent.

• Electrical specs: 11.55V, 50Wh / 4335mAh for sustained output.
• Form factor and connector designed to mirror OEM fit and alignment.
• Certified to safety standards (CE and UL) for compliance and reliability.

What should I do if the laptop doesn’t recognize the new battery right away?

New batteries sometimes need a simple activation routine to register with the laptop’s firmware. If your ZenBook doesn’t show the replacement immediately, verify the physical connection and then follow basic wake‑up steps to help the system detect the pack correctly.

• Reseat the battery and ensure the connector is fully engaged.
• If unrecognized, discharge to about 10–20% (avoid 0%), then fully charge.
• Perform 3–4 charge/discharge cycles to stabilize battery reporting.

Is this ZTHY battery safe and certified for regular use?

ZTHY manufactures batteries to meet common consumer electronics safety standards and runs compatibility checks to reduce installation issues. The pack carries CE and UL certifications and is produced under environmental and safety guidelines applicable to laptop components.

• Safety certifications: CE and UL testing completed.
• Manufactured to environmental and quality checks for consumer electronics.
• Designed to match OEM electrical and physical specifications for safe operation.

Who is this for: This ZTHY replacement battery suits ZenBook 13 owners, IT technicians, and repair shops that need an OEM‑style power pack for UX333 family laptops. It’s ideal for anyone who wants to regain original battery life without replacing the entire laptop, and for power users who require predictable performance and certified safety standards.